Auxiliary Views

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Auxiliary Views
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Auxiliary Views
An auxiliary view is an orthographic projection
of an angled surface on an object, which appears
foreshortened in a typical multiview
drawing. Auxiliary views are used to show the
true size and shape of an angled surface and its
features.
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Foreshortened Surfaces
Foreshortened surfaces on multiview drawings do
not give a clear or accurate representation of
size or shape and should not be dimensioned.
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Foreshortened Surfaces
An auxiliary view allows the viewer to look
perpendicular to an angled surface to witness the
true size and shape of that surface and its
features (a hole in this example).
True Height
Auxiliary Distance
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Types of Auxiliary Views
There are three types of ordinary auxiliary
views depth auxiliary, height auxiliary, width
auxiliary.
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Types of Auxiliary Views
A depth auxiliary view is derived from a front or
back view of an object and will show true
depth. A width auxiliary view is derived from a
side view of an object and will show true
width. A height auxiliary view is derived from
the top or bottom view of an object and will show
true height.
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Creating Auxiliary Views
Step 1 Start with a multiview drawing of an
object that contains a canted surface. In this
case, the canted surface for which the auxiliary
view will be created is shown as an angled edge
in the front view.
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Creating Auxiliary Views
Step 2 Determine which true dimension will be
shown by the auxiliary view and identify
reference edges on the proper existing
view. Draw appropriately spaced construction
lines where the auxiliary view will occur. These
construction lines will serve as reference lines
and must be parallel to the angled edge in
question.
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Edge View ofReference Plane
Reference Line
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Creating Auxiliary Views
Step 3 Draw construction lines outward from
each corner on the view from which the auxiliary
view will be a 90 rotation. The lines must be
perpendicular to the angled edge in
question. Identify the relationship between the
corners of the object and the intersections of
the construction lines.
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Creating Auxiliary Views
Step 4 Draw object lines to connect corners
that share a visible edge.
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This auxiliary view, as projected from the front
view, shows the true size and true shape of one
of the angled surfaces. If a feature, such as a
hole, were located on this surface, it could now
be properly dimensioned.
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Partial Views
Foreshortened object faces may have complex
shapes or curves that can be difficult to
draw. Short break lines and partial views may be
used to remove the need to draw difficult curves
on foreshortened faces, while still maintaining
complete shape description within a multiview
drawing.
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Partial Views